Back calculation and hazard prediction of a debris flow in Wenchuan meizoseismal area,China

Bulletin of Engineering Geology and the Environment - On August 20, 2019, many catastrophic debris flows broke out in meizoseismal area of Wenchuan M s 8.0 earthquake in China under the influence...     

国际工程技术管理的思路及创新

通过比较国内外项目工程技术管理的差异,国内外项目工程监理的管理权限差异,国内外工程质量标准的差异,介绍了国际项目管理中对技术管理影响的因素,论述了国际项目工程技术的管理内容和管理思路,并探讨了国际项目技术管理的创新管理.从而实现了降低项目施工成本、向技术要效益的目标.     

基础隔震结构等效线性化方法研究

比较了8种基于非退化双线性模型的等效线性化方法,评价它们的等效周期、阻尼比、对位移反应的估计精度以及估计精度对模型参数的敏感性。结果表明,各种方法的估计精度受模型参数的影响明显,结合基础隔震结构的特征,建议在其反应谱分析方法中采用JPWRI法或Hwang法。另外,本文提出割线刚度-平均阻尼法和考虑初始周期影响的修正割线刚度-平均阻尼法,从而实现在更广的模型参数范围内给出更高的估计精度。     

非线性表现——浅析数字时代建筑创作的新表现主义倾向

当今社会已经步入21世纪的数字化信息时代,＂复杂性科学＂的兴起转变了大众的审美意识。在虚拟现实的数字技术的催化作用下,新表现主义建筑应运而生,呈现出＂非线性＂美学特征。这带来的不仅是建筑设计的创新,还将是建筑产业的深度变革。     

Comparative study of ozonation and synthetic goethite-catalyzed ozonation of individual NOM fractions isolated and fractionated from a filtered river water

This study comparatively investigated ozonation and synthetic goethite-catalyzed ozonation of individual natural organic matter (NOM) fractions in terms of ozone consumption, dissolved organic carbon (DOC) and UV-absorbance reduction, molecular weight (MW) distribution, and formation of low-MW oxidation by-products. Hydrophobic acid and neutral (HOA and HON) and hydrophilic acid and base (HIA and HIB) were four major NOM fractions isolated from a filtered river water; so ozonation and catalytic ozonation were carried out on these fractions. Results indicate that in comparison to ozonation alone, catalytic ozonation can enhance ozone consumption, UV(254) and DOC reduction, fragmentation of fraction components with MW>3000Da, and formation of oxalic acid for these fractions under normal reaction conditions commonly adopted in water treatment plants. In addition, catalytic ozonation can enhance aldehydes formation and increase the percentage of easy biodegradable organic carbon compared with ozonation alone for HIA and HIB, but exert much less effect on these items for HOA and HON.     

The Limits of Decentralisation in Urban Zambia

Against a background of the expansion of decentralisation across sub-Saharan Africa and widespread debates concerning the benefits associated with decentralisation, this article analyses the example of Zambia. The paper highlights the “limits” or constraints affecting the success of decentralisation. From detailed research in Ndola, attention is drawn to several issues surrounding the council’s inadequate human resource base as well as critical funding constraints which impact upon public service delivery.

非节点集中荷载作用下索拱结构实例分析

索拱结构是大变形组合结构。本文对索拱结构在非节点集中荷载作用下的受力进行分析 ,并得出非节点集中荷载作用下 ,两节点间做成折线形拱比直线形拱受力性能好。